Heteroecus flavens (sexgen)

Andricus confertus (agamic)

Atrusca trimaculosa (agamic)

Callirhytis flavens, new species

Gall--Subglobular, found singly, in clusters, or several grown together on leaves projecting above and below and sometimes inhibiting the growth of the leaf. The color when mature is light green, sometimes tinged with red. Internally composed of a pithy substance. Diameter 2-5 mm.

The type material was collected by Miss Georgie Bentley in May. Adults emerged in the breeding room during the summer. [Only a female is described.]

Host: Quercus vaccinifolia, chrysolepis

Range: Eldorado County, Santa Clara County CA, 

Andricus confertus new species

Gall--A rounded, closely packed mass of galls occurring on the midribs or lateral veins on the undersides of leaves (rarely on upper side). The masses are from 6 to 8 mm long and almost as wide, each mass containing from few to 20 or more galls. Each gall is rounded on the outer surface and compressed basally. Easily detached when ripe and deciduous. Color pink or rose when fresh, tan when old and dry; 1 to 3 mm in diameter. Monothalamous.

Host: Quercus lobata

Type locality.--Stanford campus Santa Clara county CA

Note.--This species is described from ten females cut out in March from galls collected in November and December. Many galls opened in March contain insects still in larval stage.

Callirhytis trimaculosa new species

Gall.--Small, reddish-brown, subglobular, covered densely with crystalline spicules, found singly or in clusters of two on the undersides of leaves. Monothalamous. Diameter, 2-5 mm.

Host.--Quercus lobata Nee.

Type locality.--Stanford campus, Santa Slara County, CA

Galls collected in December. Adults emerged in early summer.

California Gall-making Cynipidae: With Descriptions of New Species